Let a re-run of genesis find the package registry it raised itself under its own name (hq ADR 0100)

internal/bootstrap/ports_test.go

@@ -284,3 +284,16 @@ func TestAGenesisOnTheDefaultsSetsNoSettings(t *testing.T) {
 		t.Errorf("a converged genesis on the default ports set settings: %v", c.told)
 	}
 }
+
+func TestARerunOfGenesisFindsItsOwnPackageRegistry(t *testing.T) {
+	// Raised by genesis itself with no label and no record, so a re-run finds it unlabelled.
+	m := machineRunner{unlabelled: map[string]bool{giteaBootstrap: true}}
+	rerun := store.State{Resources: []store.Applied{{ID: "store", Type: "container", Target: "mesh-store"}}}
+	if err := NamesFree(context.Background(), m.run, []string{giteaBootstrap, "mesh-store"}, rerun); err != nil {
+		t.Errorf("a re-run refused the package registry genesis raised: %v", err)
+	}
+	// On a machine genesis never ran on, a container under that name is a predecessor's.
+	if err := NamesFree(context.Background(), m.run, []string{giteaBootstrap}, store.State{}); err == nil {
+		t.Error("a container under the package registry's name on a fresh machine was not refused")
+	}
+}